log in – trepmal.com

Add Log In/Out Links to Custom Menu

Sometimes you want to add a log in/out link (depending on whether the current user is logged in or not) in your main menu. Here’s a simple way to add them to the end.

add_filter( 'wp_nav_menu_items', 'add_loginout_link', 10, 2 );
function add_loginout_link( $items, $args ) {
    if (is_user_logged_in()) {
        $items .= '<li><a href="'. wp_logout_url() .'">Log Out</a></li>';
    }
    else {
        $items .= '<li><a href="'. site_url('wp-login.php') .'">Log In</a></li>';
    }
    return $items;
}

Allow Users to Log In with Registered Email Address

It seems to be more and more common to see sites that allow users to log in with their username or email address.

Here’s how to add that ability to WordPress

//remove_filter('authenticate', 'wp_authenticate_username_password', 20, 3);
add_filter('authenticate', 'wp_authenticate_username_password_redux', 20, 3);
function wp_authenticate_username_password_redux( $user, $username, $password ) {
    if ( is_email( $username ) ) {
        $user_obj = get_user_by_email( $username );
        if ( $user_obj ) $username = $user_obj->user_login;
    }
    return wp_authenticate_username_password( $user, $username, $password );
}

* works with or without the remove_filter line.

Redirect Users to a Custom Log In Page

Relevant for WordPress 4.4: https://core.trac.wordpress.org/ticket/35103

If you’ve created a login page that isn’t at /wp-login.php, here’s a simple way you can redirect users who click on the “Log In” links to your new page:

add_filter( 'login_url', 'new_login_url', 10, 2 );
function new_login_url( $login_url, $redirect ) {
    return '/log-in/';
}

Add the “Lost Password?” Link to wp_login_form() Output

If you’re using the handy wp_login_form() function to create a custom log in page, you may have noticed that you don’t get the “Lost Password?” link. Doesn’t take much to add it back:

add_action( 'login_form_middle', 'add_lost_password_link' );
function add_lost_password_link() {
	return '<a href="/wp-login.php?action=lostpassword">Lost Password?</a>';
}

Redirect Users at Login

Sometimes, it might be necessary to redirect users to some page other than the dashboard. In the example below, users are redirected to their profile page when they log in.

add_filter( 'login_redirect', 'redirect_to_profile', 10, 2 );
function redirect_to_profile( $redirect_to, $user ) {
    return admin_url('profile.php');
}

Change the Login Screen Image

Normally, when you visit the login screen, there’s a nice WordPress image. If you want to change that to something else, this is how:

add_action('login_head', 'change_login_image');
function change_login_image() {
	$name = urlencode(get_option('blogname'));
	?><style type="text/css"> h1 a { background-image: url('http://dummyimage.com/310x70/f9/000&text=++<?php echo $name; ?>+'); } </style><?php
}